A shul that I have gone to has a custom that the Bat Mitzvah girl recites a section from Ketuvim (usually from Divrei Hayamim or Nechemia) in front of the congregation (men and women are there). She, ...

I know listening to a woman sing when she is married or a niddah in person is for sure asur.
I know Rabbi Moshe Feinstein says (O.C. vol 1, S 26) that in a theoretical case where she is unmarried and ...

If a women starts singing in a room with men, despite knowing they observe kol isha, is she liable for her voice being heard or are the men that hear liable?
If a women dresses non-tzneiz in front of ...